how bad do i feel

[kingsknight]

Went out with 2 of my friends today for a nice long ride and 30miles from home craig (my mate) was over taking me on his RS125 (doing about 95-100mph) then out of no where he just seemed to slow right down without his brake light coming on.

he was on the outside lane and the car behind him had to slam on his brakes. he had to pull over both lanes. Dam my heart stopped.

He had no brake down recovery so we had to wait for 2 and half hours for his dad to come pick his bike up.

was only about 6 months ago since the last engine went bang.

So craig and his bike is on its way home. Me and my other mate rob thought it was a good idea to go home.

we got about 15 miles away from brighton when me and rob come to a set of lights. He pulled up aside of me giving it loads of revs. So i was like "fine ill have to kane ya ass off the lights AGAIN rob"

We both fly off the lights when i hear a loud POP sound. look in my mirror and theres rob pulled over on the side of the road.

His poor TZR has gone bang. We know why his bike when bang bang tho. He forgot to put 2 stroke oil in it :-S


I feel well shitty. i was the only one who got back with a working bike.

craig said once he fixes his RS he will be selling it and getting an NSR. So in a few weeks you all shell be seeing an add for his bike
Its an 02 model
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TS50 (sold) NS125F (sold) NSR125R-K (write off after 2 crashes) CG125 (nicked) XR125L-3 (Sold )-: ) DR125SM '11 (sold yay) XL125V '12 (In love with this bike) XT600E '04 (fun on the dirt)

[Wave2k]

gotta love them 2 strokes
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Ducati 1299 Panigale
2009 Corvette C6 z51
RS125->CBR400->RXS100->GSXR750K2->Ducati749S->CBR600RR5->TL1000R->DRz400->RSVR1000->Honda VTR SP1->CBR400->GSXR1000K6->Honda H100->CBR600RR3->Ducati1299

[Chriss]

Forgetting things like two stroke oil is the reason I'll never buy a two stroke. That and I hear they're unreliable.

Mind you, when a four stroke goes wrong, normally it's a small component that needs replacing, whereas two strokes seem to go with style. At least, that's my expireance (someone correct that, the spell check doesn't know what word it is no matter how many times I try to correct it)
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TheShaggyDA: I've got 3 or 4 pairs that predate my wife, so at least 11.5 years old.

[Wave2k]

My RS125s gearbox went kaBOOM on the m25
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Ducati 1299 Panigale
2009 Corvette C6 z51
RS125->CBR400->RXS100->GSXR750K2->Ducati749S->CBR600RR5->TL1000R->DRz400->RSVR1000->Honda VTR SP1->CBR400->GSXR1000K6->Honda H100->CBR600RR3->Ducati1299

[kingsknight]

Really depends on the bike. Iv done over 6000miles on my NSR with hardly any problems. The only one problem iv had is my starter motor messed up which i needed to fix.

The thing is, 4T are more reliable on the hole then 2T bikes but you get so much more power out of a 2T 125 then you do out of a 4T 125 bike.

My mates got a CBR125R ands its slow as shit. I have to keep pulling over and waiting for him.

my NSR kicks out about 23bhp and my mates CBR kicks out 12bhp tops.

If you want something to get you to work and back get a 4T 125 if you want something fun to ride get a 2T 125
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TS50 (sold) NS125F (sold) NSR125R-K (write off after 2 crashes) CG125 (nicked) XR125L-3 (Sold )-: ) DR125SM '11 (sold yay) XL125V '12 (In love with this bike) XT600E '04 (fun on the dirt)

[tatters]

[Chriss]

[kingsknight]

Thanks Tatter making me feel good for owning a 2 stroke
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TS50 (sold) NS125F (sold) NSR125R-K (write off after 2 crashes) CG125 (nicked) XR125L-3 (Sold )-: ) DR125SM '11 (sold yay) XL125V '12 (In love with this bike) XT600E '04 (fun on the dirt)

[stinkwheel]

I have to agree with Tatters (although perhaps without quite so much profanity ).

When a 4-stroke engine goes wrong it is like a bomb has gone off inside your engine.

Give you an example. A big-end bearing collapsed on my mates GPZ305. In roughly chronological order, this allowed the piston to strike a valve, the valve bent cracking the cylinder head, the piston deformed in the bore and seized up, the engine tried to keep turning and ripped the gudgeon pin out through the bottom of the piston scattering shards of aluminium all over the inside of the crankcase, this also put a 20 degree bend in the con-rod which proceeded to score the barrel. Oh, and the crank got badly bent which in turn knocked the timing sensor for the CDI off its mounting.

Scratch one engine.

The two strokes probably just need a rebore and a new piston kit. (maybe some new main bearings, but probably not)
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“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[the grim reaper]

In my considerable EXPERIENCE (ffs, it's not difficult) strokers are cheaper to fix when they go bang but it is much easier to stop a 4 stroke from going bang. Good maintenance can see a 4 stroke go on forever, whereas the most rigorous maintenance will not stop a stroker from exploding.

Obviously manufacturing defects can still kill a 4 stroke but they are much more reliable than strokers.

Cheers

Grim
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Adverts don't always work: Remember that advert, where the army are running across the desert and they have a wounded man on a stretcher. They get to a ravine, the bridge is down and a caption pops up that says, 'What are you thinking?'. I don't know about you but I was thinking, 'Christ, I'm glad I'm not in the f***ing army'.

[getyerkneedow...]

[aqualung1]

sounds an interesting day KK and one for the memories when 20+ years on, you are with your mates gleaming Japanese biking corporation qrtwert1900's outside ( the restricted model it is 20 years on)
at least you all made it home
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"still no idea where poohsticks bridge is"
www.bosunsbikes.com

[2t-Screamer]

depends on the 2 stroke in question, the RS125 is well known for seizing up,

i had an rd125lc mark 2 with 38000 miles on the clock.

my mate had it for 3 years before me and hammered it everyday, and i bought it of him and hammered it for a further 3 years so thats six years of constant abuse and it only had 1 rebore between us (didn't really need it) and the spinning thing on the left of the crank (alternator / rotor ?) failed, and thats it, Never let us down, never siezed,or displayed any signs that the engine was about to pop, so there, the RS sucks, yamaha rule
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visit Collective Knowledge

[Kickstart]

Hi

A 4 stroke going bang will be messy, unless it is something minor like the head gasket.

Fail to top the oil up on a 2 stroke and a red light comes on to remind you to do it soon. Do the same on a 4 stroke and a red light comes on to tell you that the oil pressure just dropped to nothing and you have wrecked the engine.

This piston is the result of a 4 stroke going bang.

While you can say that maintenance will stop a 4 stroke going bang, the same pretty much applies to a 2 stroke. Replacing the piston is maintenance (and probably easier than adjusting the valves on many shimmed engines).

The NSR is not really that much more reliable than the RS. Seems to suffer mechanical abuse a bit better, but also seems to have more major electrical issues.

How many miles had this RS done since the piston and rings were replaced?

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[G]

Remember, valves still need to be done quite regularly on a 4 stroke.

Personally I'd prefer to do piston rings on a 2 stroke than valves on a 4 stroke.


If you run low on oil on a 4 stroke it can also go bang - so the same applies to whichever bike you have; make sure the engine is lubricated!